Back in here, I'm afraid:

On 21-Feb-06, at 9:52 PM, Dave Bradley wrote:

> First off, you can upsample a 16-bit file to 1 24-bit file with 
> absolutely no increase in noise or relative distortion. If you find 
> elsewise, then you are either doing it wrong, or have really poor 
> software.

Distortion is a change in the sound. You are adding information that is 
not there, hence, it is a distortion. "Cleaning up" the sound, is also 
a distortion, of course. Everything adds distortion, starting at the 
microphone, so life is a question of minimizing the distortions, and 
being mindful of which and how you are adding...Personally, if I were 
going to be doing my processing at 24 bit (which I wasn't commenting on 
in my last post), I would transfer it at 24...I'm not so sure I would 
be upres-ing to 24 from a 16 bit; I would have to think about it quite 
a bit further, and would bet it had something to do with circumstances 
being that I didn't have hold of the original, and there were very 
special circumstances to warrant the upresing and dithering in addition 
to the processing.



> Second off, the error caused by truncating OR dithering would be 
> within 1 value, not 14, so again the point is moot. You would prefer 
> to increase errors by up to 14 points (in my example) just so you can 
> avoid adding a possible 1 point error?  Hardly what I'd call a sound 
> business practice when accuracy is indeed a necessity.
>> And this is regardless of what software or noise-shaping algorithms 
>> used.  Why do all this to audio from a cassette that most likely 
>> already suffers from noise/hiss problems?  Oh, and last but not 
>> least, my ears can pick up the other problems that this scenario 
>> creates -- audible digital artifacts.  The only way to avoid having 
>> to deal with this mess is to do the job right in the first place and 
>> make the original transfers in 24 bit.  It might be best for the 
>> original poster to invest a few dollars in obtaining an Alesis 
>> Masterlink.
>> One man's opinion.
>> Bob Conrad
>> Fort Lee, NJ

Alyssa Ryvers

Composer / Sound Engineer
Music North